Concrete form clamp



Dec. 4, 1962 H. A. KOEHLER CONCRETE FORM CLAMP 2 Sheets-Sheet 1 FiledApril 19, 1961 Herman A. Koeh/er Fig 2 INVENTOR.

BY and Dec. 4, 1962 H. A. KOEHLER 3,066,962

CONCRETE FORM CLAMP Filed April 19, 1961 Herman A. Kae/r/er 1 N VE NTOR.

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Ilnited rates Patent @ffice 3,fifi,962 Patented Dec. 4, 1952 snseeezCONCRETE FGRM QLAMI Herman A. .Koehler, 3674 SW. 25th St, Miami, Fla.Filed Apr. 19, 196i, tier. No. 104,141

- 13 Claims. (c1. 2s7-54 This invention relates to hardware or fittingswhereby cross timbers may be locked in position so as to square and backthe walls of a form within which plastic material is poured and moreparticularly relates to fittings for locking cross timbers in a backingand corner squaring installation for a concrete column form.

It is therefore a primary object of the present invention to provide anew and useful hardware fitting whereby any length of lumber such as twoby four beams, may be used as pressure backings for plywood concreteforms as well as to provide a secure corner squaring assembly for theforms.

By use of the fittings of the present invention, a tremendous reductionin materials, time and labor is effected in that the amount of nailingneeded at the corners of the form may be reduced in view of theincreased backing pressure and squaring facilities provided. A furtherreduction in cost in erecting the concrete form is effected by virtue ofthe ability of the fitting hardware of the present invention to directlysquare the corners of the form.

A still further object of this invention is to provide hardware whichwill clamp crossed timbers in place for pressure backing and cornersquaring purposes on concrete forms and which will facilitatedisassembly of the form so as to reduce the disassembly time andbreakage of the lumber during the disassembly.

An additional object of this invention is to provide concrete form clampfittings which are extremely simple in design, and have no moving partsso as to render the fittings economical in cost and maintenance and yetprovide fittings which are more advantageous and useful in particularfor concrete square column forms.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fullyhereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

7 FIGURE 1 is a perspective view of a concrete form fitting or clampmade in accordance with this invention. FIGURE 2 is a top plan view of asquare column form installation utilizing four fitting devices of thepresent invention. 7

FIGURE 3 is a partial perspective view of one corner of the installationillustrated in FIGURE 2.

FIGURE 4 is a sectional view taken substantially through a planeindicated by section line 4-4 in FIG- .URE 3.

Referring now to the drawings in detail, the novel concrete form fittingor clamp device of the present invention which is generally referred toby reference numeral is illustrated in connection with an installationfor which .it is particularly useful. Accordingly, as seen in FIGURE 2,a concrete column form assembly generally referred to by referencenumeral 12 is illustrated including parallel form Walls 14 and 16disposed in perpendicular relation to the parallel form walls 18 and 29.The walls 14 and 16 are respectively braced by timbers 22 and 24 whichmay be for example, two by four lumher, while the walls 18 and arebacked by the timbers 26 and 28 respectively. It will also be observedthat the timbers 28 and 26 are disposed above the timbers 22 and 24 andarranged perpendicular thereto so that the assembly of the timbers alsosquares the corner of the form assembly 12. The timbers are thereforeheld 2?. in the illustrated position by the novel form clamping devices10.

Referring now to FIGURES l and 3 in particular, it will be observed thatthe fitting device l ll is composed of a lower member generally referredto by reference numeral 39 which is disposed in interfitting relationand Welded to an upper member generally referred to by reference numeral32. The members 33 and 32 are disposed in perpendicular relation to eachother. The lower member 3!) is generally of a rectangular invertedchannelshaped configuration, said member including a top plate portion 3from which parallel side channel walls 36 and depend. It will beobserved, that the side channel wall 36 extends along the entire lengthof the top por tion 34. The channel wall 38 on the other hand, extendsfrom one end 49 of the lower member 36 along a portion of the topportion 34. The channel wall 38 accordingly terminates at a shoulderedge 42 formed on the top plate portion 54 which shoulder edge 4-2 isdisposed perpendicular to the edge 44 of a slightly narrower portion ofthe top portion 34-. Connected to the portion 34 adjacent the other end46 of the lower member 30 and projecting upwardly therefrom is ananchoring plate member or flange 48 which is disposed in parallelrelation to the side channel walls 36 and 38. A pair of alignedapertures 5th and 52 are disposed in the anchoring plate member 48 andthe channel wall 36 respectively, through which nails may be insertedfor temporarily anchoring the lower member 39 to the Wall of the formwith which it is associated and to secure thereto the timber associatedwith the lower channel member 30.

The upper channel member 32 is of similar construction to the lowerchannel member as but is disposed in perpendicular relation thereto. Theupper channel member 2 accordingly also includes a top plate portion 54from which a pair of parallel side channel walls or flanges 56 and 58depend. The side channel walls 56 and 58 diifer however from the sidechannel walls 36 and 38 of the lower channel member 30 in that theyinclude recessed portions 6% and 62 by means of which the upper channelmember 32 is disposed in interfitting relation to the lower channelmember 30 and welded thereto along the interfitting edges as moreclearly seen in FIGURE 3.

It will be further observed, that the upper channel member 32 alsoincludes a shoulder edge 64- disposed in perpendicular relation to theside edge 66. The corner formed between the edges 64 and 66 on the upperchannel member 32. and the corner formed by the edges 42 and 44 on thelower channel member 30 define, the squared edge for the concrete formwhen the fitting 10 is placed thereagainst. An anchoring plate member orflange 68 is therefore also provided adjacent end 70 of the upperchannel member 32 with nailing apertures 72 and 74- being disposed inthe anchoring plate 68 and the side channel wall 56.

Referring now to FIGURES 3 and 4 in particular, it will be observed thatthe timber 24 is slidably received between the top portion 34 and sidechannel walls 36 and 38 of the lower channel member 30. The lumber 24 issecured to the lower channel member 30 by a nail 76 while the channelmember 30 itself is disposed up against the wall 16 of the form assembly12 with the anchoring plate 48 abutting against the wall 16 and beingsecured thereto by a nail 73. It will be appreciated although not shownin FIGURE 3, that the squaring edges 42 and 44 on the lower channelmember 30 will be disposed up against the corner of the wall 16.

The upper channel member 32 which is welded to the lower channel member30 also slidably receives the timber 26 between the upper plate portion54 and side channel walls 56 and 58. As more clearly seen in FIG- URE 4,the timber 26 will be disposed up against the form wall 18 and hencespaced a short distance from the side channel wall 58 in view of theintermediate terminal edge thereof being disposed in abutting relationagainst the wall 16 so that the perpendicular edges 64 and 66 may squarethe corner forms by the walls 16 and 18. The anchoring plate member 68is therefore disposed in contact with the wall 18 and anchored theretoby the nails 80. The timber 26 is in turn secured to the upper channelmember 32 by the nails 82. As shown to advantage in FIGURE 1 of thedrawing the inner sides of the channel members 30 and 32 are open andrecessed from the shoulders 42 and 64 to the inner ends of said memberswhereby the timbers 24 and 26 are exposed for abutting engagement withthe form.

From the foregoing description, the clamping of each of the timbersadjacent to opposite corners of the wall against which the particulartimber is disposed, will be apparent. It will be further apparent, thatthe squaring and backing of the concrete form assembly 12 by the crosstimbers may be accomplished with great dispatch and ease and may even beperformed by a single man whereas two men were heretofore required inorder to properly stack and square the concrete form assembly 12.Furthermore, the assembly of the described installation may be readilydisassembled by simple removal of the nails associated with each of thefitting devices 10.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A fitting for locking crossed timbers in a backing and cornersquaring installation for concrete forms, comprising, a lower invertedchannel member slidably receiving a first timber therethrough, an upperinverted channel member interfitted with and disposed perpendicular tothe lower member for slidably receiving a second timber above the firsttimber, shoulder means formed on one side of each member for abutmentagainst a corner formed by walls of a form, and anchoring means mountedon said one sides of the members in spaced relation to the shouldermeans for abutment against the respective corner forming walls of theform, said one sides of the members being open and recessed from theshoulders to the inner ends of said members for exposing the timbers forabutting engagement with the form.

2. The combination of claim 1 wherein said members include means forsecuring the timbers within their respective members in corner formingand wall backing contact with the respective walls of the form.

3. The combination of claim 2, wherein said members include paralleldownwardly depending side channel walls, the channel walls on said oneside of each member extending from one end of the member and terminatingat the shoulder means.

4. The combination of claim 3, wherein said anchoring means comprises aplate projecting upwardly from the member adjacent an end thereofopposite said one end in parallel relation to the side channel walls.

5. The combination of claim 4, wherein the side channel walls of theupper member include recessed portions for interfitting connection ofthe upper member to the lower member.

6. The combination of claim 5, wherein the anchoring means and channelwalls on the other side of each member includes apertures in verticallyspaced parallel relation to each other for nailing the members to theform walls and the timbers to the members.

7. The combination of claim 1, wherein said members are channel-shapedincluding parallel downwardly depending side channel walls, the channelwalls on said one side of each member extending from one end of themember and terminating at the shoulder means.

8. The combination of claim 7, wherein the side channel walls of theupper member include recessed portions for interfitting connection ofthe upper member to the lower member.

9. The combination of claim 8, wherein the anchoring means and channelwalls on the other side of each member includes apertures in verticallyspaced parallel relation to each other for nailing the members to theform walls and the timbers to the members.

10. A fitting for locking crossed timbers in a backing and cornersquaring installation for concrete forms, comprising, an inverted lowchannel member slidably receiving a first timber therethrough, aninverted upper channel member interfittingly connected to and disposedperpendicular to the lower member for slidably receiving a second timberabove the first timber, and means mounted on said members for nailingthe members to a form and the timbers to the members.

11. A corner clamp for concrete forms of the type including a pair ofcrossed timbers, said clamp comprising upper and lower inverted channelmembers crossed and fixedly secured together at an intermediate pointand longitudinally receiving the timbers, the inner longitudinalmarginal portions of said members including, at an intermediate point,transverse shoulders for abutting the form, said inner longitudinalmarginal member portions being recessed and open from the shoulders tothe inner ends of said members for exposing the timbers for abuttingengagement with the form, and means for securing said members to theform with the timbers in abutting engagement therewith.

12. A corner clamp in accordance with claim 11, said means includingupstanding apertured flanges integral with said recessed innerlongitudinal marginal member portions.

13. A corner clamp in accordance with claim 12, said upper membercomprising on its outer end portion depending side fiange portionsincluding ends abutting the outer longitudinal side of the lower memberand aflixed thereto.

References Cited in the file of this patent UNITED STATES PATENTS901,209 Sullivan Oct. 13, 1908 985,086 Wilkes Feb. 21, 1911 2,317,125Barnett Apr. 20, 1943 2,624,083 Butler Jan. 6, 1953 2,646,285 SnyderJuly 21, 1953

